Commit | Line | Data |
---|---|---|
50656eec | 1 | /* |
0e60836b | 2 | * probe-event.c : perf-probe definition to probe_events format converter |
50656eec MH |
3 | * |
4 | * Written by Masami Hiramatsu <mhiramat@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | */ | |
21 | ||
22 | #define _GNU_SOURCE | |
23 | #include <sys/utsname.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <fcntl.h> | |
27 | #include <errno.h> | |
28 | #include <stdio.h> | |
29 | #include <unistd.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
4de189fe MH |
32 | #include <stdarg.h> |
33 | #include <limits.h> | |
50656eec MH |
34 | |
35 | #undef _GNU_SOURCE | |
31facc5f | 36 | #include "util.h" |
50656eec | 37 | #include "event.h" |
e1c01d61 | 38 | #include "string.h" |
4de189fe | 39 | #include "strlist.h" |
50656eec | 40 | #include "debug.h" |
72041334 | 41 | #include "cache.h" |
631c9def | 42 | #include "color.h" |
e0faa8d3 MH |
43 | #include "symbol.h" |
44 | #include "thread.h" | |
7ca5989d | 45 | #include "debugfs.h" |
4b4da7f7 | 46 | #include "trace-event.h" /* For __unused */ |
50656eec | 47 | #include "probe-event.h" |
4235b045 | 48 | #include "probe-finder.h" |
50656eec MH |
49 | |
50 | #define MAX_CMDLEN 256 | |
51 | #define MAX_PROBE_ARGS 128 | |
52 | #define PERFPROBE_GROUP "probe" | |
53 | ||
f4d7da49 MH |
54 | bool probe_event_dry_run; /* Dry run flag */ |
55 | ||
146a1439 | 56 | #define semantic_error(msg ...) pr_err("Semantic error :" msg) |
50656eec | 57 | |
4de189fe | 58 | /* If there is no space to write, returns -E2BIG. */ |
84988450 MH |
59 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
60 | __attribute__((format(printf, 3, 4))); | |
61 | ||
4de189fe MH |
62 | static int e_snprintf(char *str, size_t size, const char *format, ...) |
63 | { | |
64 | int ret; | |
65 | va_list ap; | |
66 | va_start(ap, format); | |
67 | ret = vsnprintf(str, size, format, ap); | |
68 | va_end(ap); | |
69 | if (ret >= (int)size) | |
70 | ret = -E2BIG; | |
71 | return ret; | |
72 | } | |
73 | ||
4b4da7f7 | 74 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp); |
d28c6223 | 75 | static struct machine machine; |
e0faa8d3 | 76 | |
469b9b88 | 77 | /* Initialize symbol maps and path of vmlinux/modules */ |
146a1439 | 78 | static int init_vmlinux(void) |
e0faa8d3 | 79 | { |
146a1439 MH |
80 | int ret; |
81 | ||
e0faa8d3 MH |
82 | symbol_conf.sort_by_name = true; |
83 | if (symbol_conf.vmlinux_name == NULL) | |
84 | symbol_conf.try_vmlinux_path = true; | |
85 | else | |
86 | pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name); | |
146a1439 MH |
87 | ret = symbol__init(); |
88 | if (ret < 0) { | |
89 | pr_debug("Failed to init symbol map.\n"); | |
90 | goto out; | |
91 | } | |
e0faa8d3 | 92 | |
469b9b88 | 93 | ret = machine__init(&machine, "", HOST_KERNEL_ID); |
d28c6223 ACM |
94 | if (ret < 0) |
95 | goto out; | |
96 | ||
469b9b88 | 97 | if (machine__create_kernel_maps(&machine) < 0) { |
0e43e5d2 | 98 | pr_debug("machine__create_kernel_maps() failed.\n"); |
469b9b88 MH |
99 | goto out; |
100 | } | |
146a1439 MH |
101 | out: |
102 | if (ret < 0) | |
103 | pr_warning("Failed to init vmlinux path.\n"); | |
104 | return ret; | |
e0faa8d3 MH |
105 | } |
106 | ||
469b9b88 MH |
107 | static struct symbol *__find_kernel_function_by_name(const char *name, |
108 | struct map **mapp) | |
109 | { | |
110 | return machine__find_kernel_function_by_name(&machine, name, mapp, | |
111 | NULL); | |
112 | } | |
113 | ||
114 | const char *kernel_get_module_path(const char *module) | |
115 | { | |
116 | struct dso *dso; | |
117 | ||
118 | if (module) { | |
119 | list_for_each_entry(dso, &machine.kernel_dsos, node) { | |
120 | if (strncmp(dso->short_name + 1, module, | |
121 | dso->short_name_len - 2) == 0) | |
122 | goto found; | |
123 | } | |
124 | pr_debug("Failed to find module %s.\n", module); | |
125 | return NULL; | |
126 | } else { | |
127 | dso = machine.vmlinux_maps[MAP__FUNCTION]->dso; | |
128 | if (dso__load_vmlinux_path(dso, | |
129 | machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) { | |
130 | pr_debug("Failed to load kernel map.\n"); | |
131 | return NULL; | |
132 | } | |
133 | } | |
134 | found: | |
135 | return dso->long_name; | |
136 | } | |
137 | ||
4b4da7f7 | 138 | #ifdef DWARF_SUPPORT |
469b9b88 | 139 | static int open_vmlinux(const char *module) |
e0faa8d3 | 140 | { |
469b9b88 MH |
141 | const char *path = kernel_get_module_path(module); |
142 | if (!path) { | |
0e43e5d2 MH |
143 | pr_err("Failed to find path of %s module.\n", |
144 | module ?: "kernel"); | |
469b9b88 | 145 | return -ENOENT; |
e0faa8d3 | 146 | } |
469b9b88 MH |
147 | pr_debug("Try to open %s\n", path); |
148 | return open(path, O_RDONLY); | |
e0faa8d3 | 149 | } |
4b4da7f7 | 150 | |
0e60836b SD |
151 | /* |
152 | * Convert trace point to probe point with debuginfo | |
153 | * Currently only handles kprobes. | |
154 | */ | |
155 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, | |
469b9b88 | 156 | struct perf_probe_point *pp) |
4b4da7f7 MH |
157 | { |
158 | struct symbol *sym; | |
469b9b88 MH |
159 | struct map *map; |
160 | u64 addr; | |
161 | int ret = -ENOENT; | |
4b4da7f7 | 162 | |
469b9b88 | 163 | sym = __find_kernel_function_by_name(tp->symbol, &map); |
4b4da7f7 | 164 | if (sym) { |
469b9b88 MH |
165 | addr = map->unmap_ip(map, sym->start + tp->offset); |
166 | pr_debug("try to find %s+%ld@%llx\n", tp->symbol, | |
167 | tp->offset, addr); | |
168 | ret = find_perf_probe_point((unsigned long)addr, pp); | |
4b4da7f7 MH |
169 | } |
170 | if (ret <= 0) { | |
146a1439 MH |
171 | pr_debug("Failed to find corresponding probes from " |
172 | "debuginfo. Use kprobe event information.\n"); | |
02b95dad MH |
173 | pp->function = strdup(tp->symbol); |
174 | if (pp->function == NULL) | |
175 | return -ENOMEM; | |
4b4da7f7 MH |
176 | pp->offset = tp->offset; |
177 | } | |
178 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
179 | |
180 | return 0; | |
4b4da7f7 MH |
181 | } |
182 | ||
183 | /* Try to find perf_probe_event with debuginfo */ | |
0e60836b SD |
184 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
185 | struct probe_trace_event **tevs, | |
469b9b88 | 186 | int max_tevs, const char *module) |
4b4da7f7 MH |
187 | { |
188 | bool need_dwarf = perf_probe_event_need_dwarf(pev); | |
189 | int fd, ntevs; | |
190 | ||
469b9b88 | 191 | fd = open_vmlinux(module); |
4b4da7f7 | 192 | if (fd < 0) { |
146a1439 MH |
193 | if (need_dwarf) { |
194 | pr_warning("Failed to open debuginfo file.\n"); | |
195 | return fd; | |
196 | } | |
4b4da7f7 MH |
197 | pr_debug("Could not open vmlinux. Try to use symbols.\n"); |
198 | return 0; | |
199 | } | |
200 | ||
201 | /* Searching trace events corresponding to probe event */ | |
0e60836b | 202 | ntevs = find_probe_trace_events(fd, pev, tevs, max_tevs); |
4b4da7f7 MH |
203 | close(fd); |
204 | ||
146a1439 | 205 | if (ntevs > 0) { /* Succeeded to find trace events */ |
0e60836b | 206 | pr_debug("find %d probe_trace_events.\n", ntevs); |
4b4da7f7 | 207 | return ntevs; |
146a1439 | 208 | } |
4b4da7f7 | 209 | |
146a1439 MH |
210 | if (ntevs == 0) { /* No error but failed to find probe point. */ |
211 | pr_warning("Probe point '%s' not found.\n", | |
212 | synthesize_perf_probe_point(&pev->point)); | |
213 | return -ENOENT; | |
214 | } | |
215 | /* Error path : ntevs < 0 */ | |
15eca306 MH |
216 | pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); |
217 | if (ntevs == -EBADF) { | |
218 | pr_warning("Warning: No dwarf info found in the vmlinux - " | |
219 | "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); | |
220 | if (!need_dwarf) { | |
0e43e5d2 | 221 | pr_debug("Trying to use symbols.\n"); |
15eca306 MH |
222 | return 0; |
223 | } | |
4b4da7f7 | 224 | } |
15eca306 | 225 | return ntevs; |
4b4da7f7 MH |
226 | } |
227 | ||
7cf0b79e MH |
228 | /* |
229 | * Find a src file from a DWARF tag path. Prepend optional source path prefix | |
230 | * and chop off leading directories that do not exist. Result is passed back as | |
231 | * a newly allocated path on success. | |
232 | * Return 0 if file was found and readable, -errno otherwise. | |
233 | */ | |
6a330a3c MH |
234 | static int get_real_path(const char *raw_path, const char *comp_dir, |
235 | char **new_path) | |
7cf0b79e | 236 | { |
6a330a3c MH |
237 | const char *prefix = symbol_conf.source_prefix; |
238 | ||
239 | if (!prefix) { | |
240 | if (raw_path[0] != '/' && comp_dir) | |
241 | /* If not an absolute path, try to use comp_dir */ | |
242 | prefix = comp_dir; | |
243 | else { | |
244 | if (access(raw_path, R_OK) == 0) { | |
245 | *new_path = strdup(raw_path); | |
246 | return 0; | |
247 | } else | |
248 | return -errno; | |
249 | } | |
7cf0b79e MH |
250 | } |
251 | ||
6a330a3c | 252 | *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2)); |
7cf0b79e MH |
253 | if (!*new_path) |
254 | return -ENOMEM; | |
255 | ||
256 | for (;;) { | |
6a330a3c | 257 | sprintf(*new_path, "%s/%s", prefix, raw_path); |
7cf0b79e MH |
258 | |
259 | if (access(*new_path, R_OK) == 0) | |
260 | return 0; | |
261 | ||
6a330a3c MH |
262 | if (!symbol_conf.source_prefix) |
263 | /* In case of searching comp_dir, don't retry */ | |
264 | return -errno; | |
265 | ||
7cf0b79e MH |
266 | switch (errno) { |
267 | case ENAMETOOLONG: | |
268 | case ENOENT: | |
269 | case EROFS: | |
270 | case EFAULT: | |
271 | raw_path = strchr(++raw_path, '/'); | |
272 | if (!raw_path) { | |
273 | free(*new_path); | |
274 | *new_path = NULL; | |
275 | return -ENOENT; | |
276 | } | |
277 | continue; | |
278 | ||
279 | default: | |
280 | free(*new_path); | |
281 | *new_path = NULL; | |
282 | return -errno; | |
283 | } | |
284 | } | |
285 | } | |
286 | ||
4b4da7f7 MH |
287 | #define LINEBUF_SIZE 256 |
288 | #define NR_ADDITIONAL_LINES 2 | |
289 | ||
d3b63d7a | 290 | static int show_one_line(FILE *fp, int l, bool skip, bool show_num) |
4b4da7f7 MH |
291 | { |
292 | char buf[LINEBUF_SIZE]; | |
befe3414 FBH |
293 | const char *color = show_num ? "" : PERF_COLOR_BLUE; |
294 | const char *prefix = NULL; | |
4b4da7f7 | 295 | |
befe3414 | 296 | do { |
4b4da7f7 MH |
297 | if (fgets(buf, LINEBUF_SIZE, fp) == NULL) |
298 | goto error; | |
befe3414 FBH |
299 | if (skip) |
300 | continue; | |
301 | if (!prefix) { | |
302 | prefix = show_num ? "%7d " : " "; | |
303 | color_fprintf(stdout, color, prefix, l); | |
4b4da7f7 | 304 | } |
befe3414 FBH |
305 | color_fprintf(stdout, color, "%s", buf); |
306 | ||
307 | } while (strchr(buf, '\n') == NULL); | |
146a1439 MH |
308 | |
309 | return 0; | |
4b4da7f7 MH |
310 | error: |
311 | if (feof(fp)) | |
146a1439 | 312 | pr_warning("Source file is shorter than expected.\n"); |
4b4da7f7 | 313 | else |
146a1439 MH |
314 | pr_warning("File read error: %s\n", strerror(errno)); |
315 | ||
316 | return -1; | |
4b4da7f7 MH |
317 | } |
318 | ||
319 | /* | |
320 | * Show line-range always requires debuginfo to find source file and | |
321 | * line number. | |
322 | */ | |
469b9b88 | 323 | int show_line_range(struct line_range *lr, const char *module) |
4b4da7f7 | 324 | { |
d3b63d7a | 325 | int l = 1; |
4b4da7f7 MH |
326 | struct line_node *ln; |
327 | FILE *fp; | |
328 | int fd, ret; | |
7cf0b79e | 329 | char *tmp; |
4b4da7f7 MH |
330 | |
331 | /* Search a line range */ | |
146a1439 MH |
332 | ret = init_vmlinux(); |
333 | if (ret < 0) | |
334 | return ret; | |
335 | ||
469b9b88 | 336 | fd = open_vmlinux(module); |
146a1439 MH |
337 | if (fd < 0) { |
338 | pr_warning("Failed to open debuginfo file.\n"); | |
339 | return fd; | |
340 | } | |
341 | ||
4b4da7f7 | 342 | ret = find_line_range(fd, lr); |
4b4da7f7 | 343 | close(fd); |
146a1439 MH |
344 | if (ret == 0) { |
345 | pr_warning("Specified source line is not found.\n"); | |
346 | return -ENOENT; | |
347 | } else if (ret < 0) { | |
348 | pr_warning("Debuginfo analysis failed. (%d)\n", ret); | |
349 | return ret; | |
350 | } | |
4b4da7f7 | 351 | |
7cf0b79e MH |
352 | /* Convert source file path */ |
353 | tmp = lr->path; | |
6a330a3c | 354 | ret = get_real_path(tmp, lr->comp_dir, &lr->path); |
7cf0b79e MH |
355 | free(tmp); /* Free old path */ |
356 | if (ret < 0) { | |
357 | pr_warning("Failed to find source file. (%d)\n", ret); | |
358 | return ret; | |
359 | } | |
360 | ||
4b4da7f7 MH |
361 | setup_pager(); |
362 | ||
363 | if (lr->function) | |
364 | fprintf(stdout, "<%s:%d>\n", lr->function, | |
365 | lr->start - lr->offset); | |
366 | else | |
62c15fc4 | 367 | fprintf(stdout, "<%s:%d>\n", lr->path, lr->start); |
4b4da7f7 MH |
368 | |
369 | fp = fopen(lr->path, "r"); | |
146a1439 MH |
370 | if (fp == NULL) { |
371 | pr_warning("Failed to open %s: %s\n", lr->path, | |
372 | strerror(errno)); | |
373 | return -errno; | |
374 | } | |
4b4da7f7 | 375 | /* Skip to starting line number */ |
146a1439 MH |
376 | while (l < lr->start && ret >= 0) |
377 | ret = show_one_line(fp, l++, true, false); | |
378 | if (ret < 0) | |
379 | goto end; | |
4b4da7f7 MH |
380 | |
381 | list_for_each_entry(ln, &lr->line_list, list) { | |
146a1439 MH |
382 | while (ln->line > l && ret >= 0) |
383 | ret = show_one_line(fp, (l++) - lr->offset, | |
384 | false, false); | |
385 | if (ret >= 0) | |
386 | ret = show_one_line(fp, (l++) - lr->offset, | |
387 | false, true); | |
388 | if (ret < 0) | |
389 | goto end; | |
4b4da7f7 MH |
390 | } |
391 | ||
392 | if (lr->end == INT_MAX) | |
393 | lr->end = l + NR_ADDITIONAL_LINES; | |
dda4ab34 | 394 | while (l <= lr->end && !feof(fp) && ret >= 0) |
146a1439 MH |
395 | ret = show_one_line(fp, (l++) - lr->offset, false, false); |
396 | end: | |
4b4da7f7 | 397 | fclose(fp); |
146a1439 | 398 | return ret; |
4b4da7f7 MH |
399 | } |
400 | ||
cf6eb489 | 401 | static int show_available_vars_at(int fd, struct perf_probe_event *pev, |
fb8c5a56 | 402 | int max_vls, bool externs) |
cf6eb489 MH |
403 | { |
404 | char *buf; | |
405 | int ret, i; | |
406 | struct str_node *node; | |
407 | struct variable_list *vls = NULL, *vl; | |
408 | ||
409 | buf = synthesize_perf_probe_point(&pev->point); | |
410 | if (!buf) | |
411 | return -EINVAL; | |
412 | pr_debug("Searching variables at %s\n", buf); | |
413 | ||
fb8c5a56 | 414 | ret = find_available_vars_at(fd, pev, &vls, max_vls, externs); |
cf6eb489 MH |
415 | if (ret > 0) { |
416 | /* Some variables were found */ | |
417 | fprintf(stdout, "Available variables at %s\n", buf); | |
418 | for (i = 0; i < ret; i++) { | |
419 | vl = &vls[i]; | |
420 | /* | |
421 | * A probe point might be converted to | |
422 | * several trace points. | |
423 | */ | |
424 | fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol, | |
425 | vl->point.offset); | |
426 | free(vl->point.symbol); | |
427 | if (vl->vars) { | |
428 | strlist__for_each(node, vl->vars) | |
429 | fprintf(stdout, "\t\t%s\n", node->s); | |
430 | strlist__delete(vl->vars); | |
431 | } else | |
432 | fprintf(stdout, "(No variables)\n"); | |
433 | } | |
434 | free(vls); | |
435 | } else | |
436 | pr_err("Failed to find variables at %s (%d)\n", buf, ret); | |
437 | ||
438 | free(buf); | |
439 | return ret; | |
440 | } | |
441 | ||
442 | /* Show available variables on given probe point */ | |
443 | int show_available_vars(struct perf_probe_event *pevs, int npevs, | |
469b9b88 | 444 | int max_vls, const char *module, bool externs) |
cf6eb489 MH |
445 | { |
446 | int i, fd, ret = 0; | |
447 | ||
448 | ret = init_vmlinux(); | |
449 | if (ret < 0) | |
450 | return ret; | |
451 | ||
469b9b88 | 452 | fd = open_vmlinux(module); |
cf6eb489 | 453 | if (fd < 0) { |
0e43e5d2 | 454 | pr_warning("Failed to open debug information file.\n"); |
cf6eb489 MH |
455 | return fd; |
456 | } | |
457 | ||
458 | setup_pager(); | |
459 | ||
460 | for (i = 0; i < npevs && ret >= 0; i++) | |
fb8c5a56 | 461 | ret = show_available_vars_at(fd, &pevs[i], max_vls, externs); |
cf6eb489 MH |
462 | |
463 | close(fd); | |
464 | return ret; | |
465 | } | |
466 | ||
4b4da7f7 MH |
467 | #else /* !DWARF_SUPPORT */ |
468 | ||
0e60836b | 469 | static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp, |
469b9b88 | 470 | struct perf_probe_point *pp) |
4b4da7f7 | 471 | { |
469b9b88 MH |
472 | struct symbol *sym; |
473 | ||
474 | sym = __find_kernel_function_by_name(tp->symbol, NULL); | |
475 | if (!sym) { | |
476 | pr_err("Failed to find symbol %s in kernel.\n", tp->symbol); | |
477 | return -ENOENT; | |
478 | } | |
02b95dad MH |
479 | pp->function = strdup(tp->symbol); |
480 | if (pp->function == NULL) | |
481 | return -ENOMEM; | |
4b4da7f7 MH |
482 | pp->offset = tp->offset; |
483 | pp->retprobe = tp->retprobe; | |
146a1439 MH |
484 | |
485 | return 0; | |
4b4da7f7 MH |
486 | } |
487 | ||
0e60836b SD |
488 | static int try_to_find_probe_trace_events(struct perf_probe_event *pev, |
489 | struct probe_trace_event **tevs __unused, | |
469b9b88 | 490 | int max_tevs __unused, const char *mod __unused) |
4b4da7f7 | 491 | { |
146a1439 MH |
492 | if (perf_probe_event_need_dwarf(pev)) { |
493 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
494 | return -ENOSYS; | |
495 | } | |
4b4da7f7 MH |
496 | return 0; |
497 | } | |
498 | ||
469b9b88 | 499 | int show_line_range(struct line_range *lr __unused, const char *module __unused) |
4b4da7f7 | 500 | { |
146a1439 MH |
501 | pr_warning("Debuginfo-analysis is not supported.\n"); |
502 | return -ENOSYS; | |
4b4da7f7 MH |
503 | } |
504 | ||
cf6eb489 | 505 | int show_available_vars(struct perf_probe_event *pevs __unused, |
469b9b88 MH |
506 | int npevs __unused, int max_vls __unused, |
507 | const char *module __unused, bool externs __unused) | |
cf6eb489 MH |
508 | { |
509 | pr_warning("Debuginfo-analysis is not supported.\n"); | |
510 | return -ENOSYS; | |
511 | } | |
e0faa8d3 MH |
512 | #endif |
513 | ||
146a1439 | 514 | int parse_line_range_desc(const char *arg, struct line_range *lr) |
631c9def MH |
515 | { |
516 | const char *ptr; | |
517 | char *tmp; | |
518 | /* | |
519 | * <Syntax> | |
520 | * SRC:SLN[+NUM|-ELN] | |
521 | * FUNC[:SLN[+NUM|-ELN]] | |
522 | */ | |
523 | ptr = strchr(arg, ':'); | |
524 | if (ptr) { | |
d3b63d7a | 525 | lr->start = (int)strtoul(ptr + 1, &tmp, 0); |
dda4ab34 | 526 | if (*tmp == '+') { |
d3b63d7a | 527 | lr->end = lr->start + (int)strtoul(tmp + 1, &tmp, 0); |
dda4ab34 MH |
528 | lr->end--; /* |
529 | * Adjust the number of lines here. | |
530 | * If the number of lines == 1, the | |
531 | * the end of line should be equal to | |
532 | * the start of line. | |
533 | */ | |
534 | } else if (*tmp == '-') | |
d3b63d7a | 535 | lr->end = (int)strtoul(tmp + 1, &tmp, 0); |
631c9def | 536 | else |
d3b63d7a MH |
537 | lr->end = INT_MAX; |
538 | pr_debug("Line range is %d to %d\n", lr->start, lr->end); | |
539 | if (lr->start > lr->end) { | |
631c9def | 540 | semantic_error("Start line must be smaller" |
146a1439 MH |
541 | " than end line.\n"); |
542 | return -EINVAL; | |
543 | } | |
544 | if (*tmp != '\0') { | |
545 | semantic_error("Tailing with invalid character '%d'.\n", | |
631c9def | 546 | *tmp); |
146a1439 MH |
547 | return -EINVAL; |
548 | } | |
02b95dad | 549 | tmp = strndup(arg, (ptr - arg)); |
d3b63d7a | 550 | } else { |
02b95dad | 551 | tmp = strdup(arg); |
d3b63d7a MH |
552 | lr->end = INT_MAX; |
553 | } | |
02b95dad MH |
554 | |
555 | if (tmp == NULL) | |
556 | return -ENOMEM; | |
631c9def MH |
557 | |
558 | if (strchr(tmp, '.')) | |
559 | lr->file = tmp; | |
560 | else | |
561 | lr->function = tmp; | |
146a1439 MH |
562 | |
563 | return 0; | |
631c9def MH |
564 | } |
565 | ||
b7702a21 MH |
566 | /* Check the name is good for event/group */ |
567 | static bool check_event_name(const char *name) | |
568 | { | |
569 | if (!isalpha(*name) && *name != '_') | |
570 | return false; | |
571 | while (*++name != '\0') { | |
572 | if (!isalpha(*name) && !isdigit(*name) && *name != '_') | |
573 | return false; | |
574 | } | |
575 | return true; | |
576 | } | |
577 | ||
50656eec | 578 | /* Parse probepoint definition. */ |
146a1439 | 579 | static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) |
50656eec | 580 | { |
4235b045 | 581 | struct perf_probe_point *pp = &pev->point; |
50656eec MH |
582 | char *ptr, *tmp; |
583 | char c, nc = 0; | |
584 | /* | |
585 | * <Syntax> | |
2a9c8c36 MH |
586 | * perf probe [EVENT=]SRC[:LN|;PTN] |
587 | * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] | |
af663d75 MH |
588 | * |
589 | * TODO:Group name support | |
50656eec MH |
590 | */ |
591 | ||
2a9c8c36 MH |
592 | ptr = strpbrk(arg, ";=@+%"); |
593 | if (ptr && *ptr == '=') { /* Event name */ | |
af663d75 MH |
594 | *ptr = '\0'; |
595 | tmp = ptr + 1; | |
146a1439 MH |
596 | if (strchr(arg, ':')) { |
597 | semantic_error("Group name is not supported yet.\n"); | |
598 | return -ENOTSUP; | |
599 | } | |
600 | if (!check_event_name(arg)) { | |
b7702a21 | 601 | semantic_error("%s is bad for event name -it must " |
146a1439 MH |
602 | "follow C symbol-naming rule.\n", arg); |
603 | return -EINVAL; | |
604 | } | |
02b95dad MH |
605 | pev->event = strdup(arg); |
606 | if (pev->event == NULL) | |
607 | return -ENOMEM; | |
4235b045 | 608 | pev->group = NULL; |
af663d75 MH |
609 | arg = tmp; |
610 | } | |
611 | ||
2a9c8c36 | 612 | ptr = strpbrk(arg, ";:+@%"); |
50656eec MH |
613 | if (ptr) { |
614 | nc = *ptr; | |
615 | *ptr++ = '\0'; | |
616 | } | |
617 | ||
02b95dad MH |
618 | tmp = strdup(arg); |
619 | if (tmp == NULL) | |
620 | return -ENOMEM; | |
621 | ||
50656eec | 622 | /* Check arg is function or file and copy it */ |
02b95dad MH |
623 | if (strchr(tmp, '.')) /* File */ |
624 | pp->file = tmp; | |
50656eec | 625 | else /* Function */ |
02b95dad | 626 | pp->function = tmp; |
50656eec MH |
627 | |
628 | /* Parse other options */ | |
629 | while (ptr) { | |
630 | arg = ptr; | |
631 | c = nc; | |
2a9c8c36 | 632 | if (c == ';') { /* Lazy pattern must be the last part */ |
02b95dad MH |
633 | pp->lazy_line = strdup(arg); |
634 | if (pp->lazy_line == NULL) | |
635 | return -ENOMEM; | |
2a9c8c36 MH |
636 | break; |
637 | } | |
638 | ptr = strpbrk(arg, ";:+@%"); | |
50656eec MH |
639 | if (ptr) { |
640 | nc = *ptr; | |
641 | *ptr++ = '\0'; | |
642 | } | |
643 | switch (c) { | |
644 | case ':': /* Line number */ | |
645 | pp->line = strtoul(arg, &tmp, 0); | |
146a1439 | 646 | if (*tmp != '\0') { |
2a9c8c36 | 647 | semantic_error("There is non-digit char" |
146a1439 MH |
648 | " in line number.\n"); |
649 | return -EINVAL; | |
650 | } | |
50656eec MH |
651 | break; |
652 | case '+': /* Byte offset from a symbol */ | |
653 | pp->offset = strtoul(arg, &tmp, 0); | |
146a1439 | 654 | if (*tmp != '\0') { |
2a9c8c36 | 655 | semantic_error("There is non-digit character" |
146a1439 MH |
656 | " in offset.\n"); |
657 | return -EINVAL; | |
658 | } | |
50656eec MH |
659 | break; |
660 | case '@': /* File name */ | |
146a1439 MH |
661 | if (pp->file) { |
662 | semantic_error("SRC@SRC is not allowed.\n"); | |
663 | return -EINVAL; | |
664 | } | |
02b95dad MH |
665 | pp->file = strdup(arg); |
666 | if (pp->file == NULL) | |
667 | return -ENOMEM; | |
50656eec MH |
668 | break; |
669 | case '%': /* Probe places */ | |
670 | if (strcmp(arg, "return") == 0) { | |
671 | pp->retprobe = 1; | |
146a1439 MH |
672 | } else { /* Others not supported yet */ |
673 | semantic_error("%%%s is not supported.\n", arg); | |
674 | return -ENOTSUP; | |
675 | } | |
50656eec | 676 | break; |
146a1439 MH |
677 | default: /* Buggy case */ |
678 | pr_err("This program has a bug at %s:%d.\n", | |
679 | __FILE__, __LINE__); | |
680 | return -ENOTSUP; | |
50656eec MH |
681 | break; |
682 | } | |
683 | } | |
684 | ||
685 | /* Exclusion check */ | |
146a1439 | 686 | if (pp->lazy_line && pp->line) { |
0e43e5d2 MH |
687 | semantic_error("Lazy pattern can't be used with" |
688 | " line number.\n"); | |
146a1439 MH |
689 | return -EINVAL; |
690 | } | |
2a9c8c36 | 691 | |
146a1439 | 692 | if (pp->lazy_line && pp->offset) { |
0e43e5d2 | 693 | semantic_error("Lazy pattern can't be used with offset.\n"); |
146a1439 MH |
694 | return -EINVAL; |
695 | } | |
2a9c8c36 | 696 | |
146a1439 | 697 | if (pp->line && pp->offset) { |
0e43e5d2 | 698 | semantic_error("Offset can't be used with line number.\n"); |
146a1439 MH |
699 | return -EINVAL; |
700 | } | |
50656eec | 701 | |
146a1439 | 702 | if (!pp->line && !pp->lazy_line && pp->file && !pp->function) { |
2a9c8c36 | 703 | semantic_error("File always requires line number or " |
0e43e5d2 | 704 | "lazy pattern.\n"); |
146a1439 MH |
705 | return -EINVAL; |
706 | } | |
50656eec | 707 | |
146a1439 | 708 | if (pp->offset && !pp->function) { |
0e43e5d2 | 709 | semantic_error("Offset requires an entry function.\n"); |
146a1439 MH |
710 | return -EINVAL; |
711 | } | |
50656eec | 712 | |
146a1439 | 713 | if (pp->retprobe && !pp->function) { |
0e43e5d2 | 714 | semantic_error("Return probe requires an entry function.\n"); |
146a1439 MH |
715 | return -EINVAL; |
716 | } | |
50656eec | 717 | |
146a1439 | 718 | if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) { |
2a9c8c36 | 719 | semantic_error("Offset/Line/Lazy pattern can't be used with " |
0e43e5d2 | 720 | "return probe.\n"); |
146a1439 MH |
721 | return -EINVAL; |
722 | } | |
50656eec | 723 | |
4235b045 | 724 | pr_debug("symbol:%s file:%s line:%d offset:%lu return:%d lazy:%s\n", |
2a9c8c36 MH |
725 | pp->function, pp->file, pp->line, pp->offset, pp->retprobe, |
726 | pp->lazy_line); | |
146a1439 | 727 | return 0; |
50656eec MH |
728 | } |
729 | ||
7df2f329 | 730 | /* Parse perf-probe event argument */ |
146a1439 | 731 | static int parse_perf_probe_arg(char *str, struct perf_probe_arg *arg) |
7df2f329 | 732 | { |
b2a3c12b | 733 | char *tmp, *goodname; |
7df2f329 MH |
734 | struct perf_probe_arg_field **fieldp; |
735 | ||
736 | pr_debug("parsing arg: %s into ", str); | |
737 | ||
48481938 MH |
738 | tmp = strchr(str, '='); |
739 | if (tmp) { | |
02b95dad MH |
740 | arg->name = strndup(str, tmp - str); |
741 | if (arg->name == NULL) | |
742 | return -ENOMEM; | |
11a1ca35 | 743 | pr_debug("name:%s ", arg->name); |
48481938 MH |
744 | str = tmp + 1; |
745 | } | |
746 | ||
11a1ca35 MH |
747 | tmp = strchr(str, ':'); |
748 | if (tmp) { /* Type setting */ | |
749 | *tmp = '\0'; | |
02b95dad MH |
750 | arg->type = strdup(tmp + 1); |
751 | if (arg->type == NULL) | |
752 | return -ENOMEM; | |
11a1ca35 MH |
753 | pr_debug("type:%s ", arg->type); |
754 | } | |
755 | ||
b2a3c12b | 756 | tmp = strpbrk(str, "-.["); |
7df2f329 MH |
757 | if (!is_c_varname(str) || !tmp) { |
758 | /* A variable, register, symbol or special value */ | |
02b95dad MH |
759 | arg->var = strdup(str); |
760 | if (arg->var == NULL) | |
761 | return -ENOMEM; | |
48481938 | 762 | pr_debug("%s\n", arg->var); |
146a1439 | 763 | return 0; |
7df2f329 MH |
764 | } |
765 | ||
b2a3c12b | 766 | /* Structure fields or array element */ |
02b95dad MH |
767 | arg->var = strndup(str, tmp - str); |
768 | if (arg->var == NULL) | |
769 | return -ENOMEM; | |
b2a3c12b | 770 | goodname = arg->var; |
48481938 | 771 | pr_debug("%s, ", arg->var); |
7df2f329 MH |
772 | fieldp = &arg->field; |
773 | ||
774 | do { | |
e334016f MH |
775 | *fieldp = zalloc(sizeof(struct perf_probe_arg_field)); |
776 | if (*fieldp == NULL) | |
777 | return -ENOMEM; | |
b2a3c12b MH |
778 | if (*tmp == '[') { /* Array */ |
779 | str = tmp; | |
780 | (*fieldp)->index = strtol(str + 1, &tmp, 0); | |
7df2f329 | 781 | (*fieldp)->ref = true; |
b2a3c12b MH |
782 | if (*tmp != ']' || tmp == str + 1) { |
783 | semantic_error("Array index must be a" | |
784 | " number.\n"); | |
785 | return -EINVAL; | |
786 | } | |
787 | tmp++; | |
788 | if (*tmp == '\0') | |
789 | tmp = NULL; | |
790 | } else { /* Structure */ | |
791 | if (*tmp == '.') { | |
792 | str = tmp + 1; | |
793 | (*fieldp)->ref = false; | |
794 | } else if (tmp[1] == '>') { | |
795 | str = tmp + 2; | |
796 | (*fieldp)->ref = true; | |
797 | } else { | |
798 | semantic_error("Argument parse error: %s\n", | |
799 | str); | |
800 | return -EINVAL; | |
801 | } | |
802 | tmp = strpbrk(str, "-.["); | |
146a1439 | 803 | } |
7df2f329 | 804 | if (tmp) { |
02b95dad MH |
805 | (*fieldp)->name = strndup(str, tmp - str); |
806 | if ((*fieldp)->name == NULL) | |
807 | return -ENOMEM; | |
b2a3c12b MH |
808 | if (*str != '[') |
809 | goodname = (*fieldp)->name; | |
7df2f329 MH |
810 | pr_debug("%s(%d), ", (*fieldp)->name, (*fieldp)->ref); |
811 | fieldp = &(*fieldp)->next; | |
812 | } | |
813 | } while (tmp); | |
02b95dad MH |
814 | (*fieldp)->name = strdup(str); |
815 | if ((*fieldp)->name == NULL) | |
816 | return -ENOMEM; | |
b2a3c12b MH |
817 | if (*str != '[') |
818 | goodname = (*fieldp)->name; | |
7df2f329 | 819 | pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref); |
df0faf4b | 820 | |
b2a3c12b | 821 | /* If no name is specified, set the last field name (not array index)*/ |
02b95dad | 822 | if (!arg->name) { |
b2a3c12b | 823 | arg->name = strdup(goodname); |
02b95dad MH |
824 | if (arg->name == NULL) |
825 | return -ENOMEM; | |
826 | } | |
146a1439 | 827 | return 0; |
7df2f329 MH |
828 | } |
829 | ||
4235b045 | 830 | /* Parse perf-probe event command */ |
146a1439 | 831 | int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev) |
50656eec | 832 | { |
e1c01d61 | 833 | char **argv; |
146a1439 | 834 | int argc, i, ret = 0; |
fac13fd5 | 835 | |
4235b045 | 836 | argv = argv_split(cmd, &argc); |
146a1439 MH |
837 | if (!argv) { |
838 | pr_debug("Failed to split arguments.\n"); | |
839 | return -ENOMEM; | |
840 | } | |
841 | if (argc - 1 > MAX_PROBE_ARGS) { | |
842 | semantic_error("Too many probe arguments (%d).\n", argc - 1); | |
843 | ret = -ERANGE; | |
844 | goto out; | |
845 | } | |
50656eec | 846 | /* Parse probe point */ |
146a1439 MH |
847 | ret = parse_perf_probe_point(argv[0], pev); |
848 | if (ret < 0) | |
849 | goto out; | |
50656eec | 850 | |
e1c01d61 | 851 | /* Copy arguments and ensure return probe has no C argument */ |
4235b045 | 852 | pev->nargs = argc - 1; |
e334016f MH |
853 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
854 | if (pev->args == NULL) { | |
855 | ret = -ENOMEM; | |
856 | goto out; | |
857 | } | |
146a1439 MH |
858 | for (i = 0; i < pev->nargs && ret >= 0; i++) { |
859 | ret = parse_perf_probe_arg(argv[i + 1], &pev->args[i]); | |
860 | if (ret >= 0 && | |
861 | is_c_varname(pev->args[i].var) && pev->point.retprobe) { | |
4235b045 | 862 | semantic_error("You can't specify local variable for" |
146a1439 MH |
863 | " kretprobe.\n"); |
864 | ret = -EINVAL; | |
865 | } | |
e1c01d61 | 866 | } |
146a1439 | 867 | out: |
e1c01d61 | 868 | argv_free(argv); |
146a1439 MH |
869 | |
870 | return ret; | |
50656eec MH |
871 | } |
872 | ||
4235b045 MH |
873 | /* Return true if this perf_probe_event requires debuginfo */ |
874 | bool perf_probe_event_need_dwarf(struct perf_probe_event *pev) | |
875 | { | |
876 | int i; | |
877 | ||
878 | if (pev->point.file || pev->point.line || pev->point.lazy_line) | |
879 | return true; | |
880 | ||
881 | for (i = 0; i < pev->nargs; i++) | |
48481938 | 882 | if (is_c_varname(pev->args[i].var)) |
4235b045 MH |
883 | return true; |
884 | ||
885 | return false; | |
886 | } | |
887 | ||
0e60836b SD |
888 | /* Parse probe_events event into struct probe_point */ |
889 | static int parse_probe_trace_command(const char *cmd, | |
890 | struct probe_trace_event *tev) | |
4de189fe | 891 | { |
0e60836b | 892 | struct probe_trace_point *tp = &tev->point; |
4de189fe MH |
893 | char pr; |
894 | char *p; | |
895 | int ret, i, argc; | |
896 | char **argv; | |
897 | ||
0e60836b | 898 | pr_debug("Parsing probe_events: %s\n", cmd); |
4235b045 | 899 | argv = argv_split(cmd, &argc); |
146a1439 MH |
900 | if (!argv) { |
901 | pr_debug("Failed to split arguments.\n"); | |
902 | return -ENOMEM; | |
903 | } | |
904 | if (argc < 2) { | |
905 | semantic_error("Too few probe arguments.\n"); | |
906 | ret = -ERANGE; | |
907 | goto out; | |
908 | } | |
4de189fe MH |
909 | |
910 | /* Scan event and group name. */ | |
93aaa45a | 911 | ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", |
4235b045 MH |
912 | &pr, (float *)(void *)&tev->group, |
913 | (float *)(void *)&tev->event); | |
146a1439 MH |
914 | if (ret != 3) { |
915 | semantic_error("Failed to parse event name: %s\n", argv[0]); | |
916 | ret = -EINVAL; | |
917 | goto out; | |
918 | } | |
4235b045 | 919 | pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); |
4de189fe | 920 | |
4235b045 | 921 | tp->retprobe = (pr == 'r'); |
4de189fe MH |
922 | |
923 | /* Scan function name and offset */ | |
4235b045 MH |
924 | ret = sscanf(argv[1], "%a[^+]+%lu", (float *)(void *)&tp->symbol, |
925 | &tp->offset); | |
4de189fe | 926 | if (ret == 1) |
4235b045 | 927 | tp->offset = 0; |
4de189fe | 928 | |
4235b045 | 929 | tev->nargs = argc - 2; |
0e60836b | 930 | tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); |
e334016f MH |
931 | if (tev->args == NULL) { |
932 | ret = -ENOMEM; | |
933 | goto out; | |
934 | } | |
4235b045 | 935 | for (i = 0; i < tev->nargs; i++) { |
4de189fe MH |
936 | p = strchr(argv[i + 2], '='); |
937 | if (p) /* We don't need which register is assigned. */ | |
4235b045 MH |
938 | *p++ = '\0'; |
939 | else | |
940 | p = argv[i + 2]; | |
02b95dad | 941 | tev->args[i].name = strdup(argv[i + 2]); |
4235b045 | 942 | /* TODO: parse regs and offset */ |
02b95dad MH |
943 | tev->args[i].value = strdup(p); |
944 | if (tev->args[i].name == NULL || tev->args[i].value == NULL) { | |
945 | ret = -ENOMEM; | |
946 | goto out; | |
947 | } | |
4de189fe | 948 | } |
146a1439 MH |
949 | ret = 0; |
950 | out: | |
4de189fe | 951 | argv_free(argv); |
146a1439 | 952 | return ret; |
4de189fe MH |
953 | } |
954 | ||
7df2f329 MH |
955 | /* Compose only probe arg */ |
956 | int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf, size_t len) | |
957 | { | |
958 | struct perf_probe_arg_field *field = pa->field; | |
959 | int ret; | |
960 | char *tmp = buf; | |
961 | ||
48481938 MH |
962 | if (pa->name && pa->var) |
963 | ret = e_snprintf(tmp, len, "%s=%s", pa->name, pa->var); | |
964 | else | |
965 | ret = e_snprintf(tmp, len, "%s", pa->name ? pa->name : pa->var); | |
7df2f329 MH |
966 | if (ret <= 0) |
967 | goto error; | |
968 | tmp += ret; | |
969 | len -= ret; | |
970 | ||
971 | while (field) { | |
b2a3c12b MH |
972 | if (field->name[0] == '[') |
973 | ret = e_snprintf(tmp, len, "%s", field->name); | |
974 | else | |
975 | ret = e_snprintf(tmp, len, "%s%s", | |
976 | field->ref ? "->" : ".", field->name); | |
7df2f329 MH |
977 | if (ret <= 0) |
978 | goto error; | |
979 | tmp += ret; | |
980 | len -= ret; | |
981 | field = field->next; | |
982 | } | |
11a1ca35 MH |
983 | |
984 | if (pa->type) { | |
985 | ret = e_snprintf(tmp, len, ":%s", pa->type); | |
986 | if (ret <= 0) | |
987 | goto error; | |
988 | tmp += ret; | |
989 | len -= ret; | |
990 | } | |
991 | ||
7df2f329 MH |
992 | return tmp - buf; |
993 | error: | |
0e43e5d2 | 994 | pr_debug("Failed to synthesize perf probe argument: %s\n", |
146a1439 MH |
995 | strerror(-ret)); |
996 | return ret; | |
7df2f329 MH |
997 | } |
998 | ||
4235b045 MH |
999 | /* Compose only probe point (not argument) */ |
1000 | static char *synthesize_perf_probe_point(struct perf_probe_point *pp) | |
4de189fe | 1001 | { |
fb1587d8 MH |
1002 | char *buf, *tmp; |
1003 | char offs[32] = "", line[32] = "", file[32] = ""; | |
1004 | int ret, len; | |
4de189fe | 1005 | |
e334016f MH |
1006 | buf = zalloc(MAX_CMDLEN); |
1007 | if (buf == NULL) { | |
1008 | ret = -ENOMEM; | |
1009 | goto error; | |
1010 | } | |
4de189fe | 1011 | if (pp->offset) { |
fb1587d8 | 1012 | ret = e_snprintf(offs, 32, "+%lu", pp->offset); |
4de189fe MH |
1013 | if (ret <= 0) |
1014 | goto error; | |
1015 | } | |
1016 | if (pp->line) { | |
fb1587d8 MH |
1017 | ret = e_snprintf(line, 32, ":%d", pp->line); |
1018 | if (ret <= 0) | |
1019 | goto error; | |
1020 | } | |
1021 | if (pp->file) { | |
dd259c5d | 1022 | len = strlen(pp->file) - 31; |
fb1587d8 MH |
1023 | if (len < 0) |
1024 | len = 0; | |
1025 | tmp = strchr(pp->file + len, '/'); | |
1026 | if (!tmp) | |
dd259c5d | 1027 | tmp = pp->file + len; |
fb1587d8 | 1028 | ret = e_snprintf(file, 32, "@%s", tmp + 1); |
4de189fe MH |
1029 | if (ret <= 0) |
1030 | goto error; | |
1031 | } | |
1032 | ||
1033 | if (pp->function) | |
fb1587d8 MH |
1034 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function, |
1035 | offs, pp->retprobe ? "%return" : "", line, | |
1036 | file); | |
4de189fe | 1037 | else |
fb1587d8 | 1038 | ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line); |
4235b045 MH |
1039 | if (ret <= 0) |
1040 | goto error; | |
1041 | ||
1042 | return buf; | |
7ef17aaf | 1043 | error: |
0e43e5d2 | 1044 | pr_debug("Failed to synthesize perf probe point: %s\n", |
146a1439 | 1045 | strerror(-ret)); |
e334016f MH |
1046 | if (buf) |
1047 | free(buf); | |
146a1439 | 1048 | return NULL; |
7ef17aaf MH |
1049 | } |
1050 | ||
4235b045 MH |
1051 | #if 0 |
1052 | char *synthesize_perf_probe_command(struct perf_probe_event *pev) | |
7ef17aaf MH |
1053 | { |
1054 | char *buf; | |
1055 | int i, len, ret; | |
1056 | ||
4235b045 MH |
1057 | buf = synthesize_perf_probe_point(&pev->point); |
1058 | if (!buf) | |
1059 | return NULL; | |
4de189fe | 1060 | |
4235b045 MH |
1061 | len = strlen(buf); |
1062 | for (i = 0; i < pev->nargs; i++) { | |
4de189fe | 1063 | ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", |
4235b045 MH |
1064 | pev->args[i].name); |
1065 | if (ret <= 0) { | |
1066 | free(buf); | |
1067 | return NULL; | |
1068 | } | |
4de189fe MH |
1069 | len += ret; |
1070 | } | |
4de189fe | 1071 | |
4235b045 MH |
1072 | return buf; |
1073 | } | |
1074 | #endif | |
1075 | ||
0e60836b | 1076 | static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref, |
4235b045 MH |
1077 | char **buf, size_t *buflen, |
1078 | int depth) | |
1079 | { | |
1080 | int ret; | |
1081 | if (ref->next) { | |
0e60836b | 1082 | depth = __synthesize_probe_trace_arg_ref(ref->next, buf, |
4235b045 MH |
1083 | buflen, depth + 1); |
1084 | if (depth < 0) | |
1085 | goto out; | |
1086 | } | |
1087 | ||
1088 | ret = e_snprintf(*buf, *buflen, "%+ld(", ref->offset); | |
1089 | if (ret < 0) | |
1090 | depth = ret; | |
1091 | else { | |
1092 | *buf += ret; | |
1093 | *buflen -= ret; | |
1094 | } | |
1095 | out: | |
1096 | return depth; | |
4de189fe | 1097 | |
4de189fe MH |
1098 | } |
1099 | ||
0e60836b | 1100 | static int synthesize_probe_trace_arg(struct probe_trace_arg *arg, |
4235b045 | 1101 | char *buf, size_t buflen) |
50656eec | 1102 | { |
0e60836b | 1103 | struct probe_trace_arg_ref *ref = arg->ref; |
4235b045 MH |
1104 | int ret, depth = 0; |
1105 | char *tmp = buf; | |
1106 | ||
1107 | /* Argument name or separator */ | |
1108 | if (arg->name) | |
1109 | ret = e_snprintf(buf, buflen, " %s=", arg->name); | |
1110 | else | |
1111 | ret = e_snprintf(buf, buflen, " "); | |
1112 | if (ret < 0) | |
1113 | return ret; | |
1114 | buf += ret; | |
1115 | buflen -= ret; | |
1116 | ||
b7dcb857 MH |
1117 | /* Special case: @XXX */ |
1118 | if (arg->value[0] == '@' && arg->ref) | |
1119 | ref = ref->next; | |
1120 | ||
4235b045 | 1121 | /* Dereferencing arguments */ |
b7dcb857 | 1122 | if (ref) { |
0e60836b | 1123 | depth = __synthesize_probe_trace_arg_ref(ref, &buf, |
4235b045 MH |
1124 | &buflen, 1); |
1125 | if (depth < 0) | |
1126 | return depth; | |
1127 | } | |
1128 | ||
1129 | /* Print argument value */ | |
b7dcb857 MH |
1130 | if (arg->value[0] == '@' && arg->ref) |
1131 | ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, | |
1132 | arg->ref->offset); | |
1133 | else | |
1134 | ret = e_snprintf(buf, buflen, "%s", arg->value); | |
4235b045 MH |
1135 | if (ret < 0) |
1136 | return ret; | |
1137 | buf += ret; | |
1138 | buflen -= ret; | |
1139 | ||
1140 | /* Closing */ | |
1141 | while (depth--) { | |
1142 | ret = e_snprintf(buf, buflen, ")"); | |
1143 | if (ret < 0) | |
1144 | return ret; | |
1145 | buf += ret; | |
1146 | buflen -= ret; | |
1147 | } | |
4984912e MH |
1148 | /* Print argument type */ |
1149 | if (arg->type) { | |
1150 | ret = e_snprintf(buf, buflen, ":%s", arg->type); | |
1151 | if (ret <= 0) | |
1152 | return ret; | |
1153 | buf += ret; | |
1154 | } | |
4235b045 MH |
1155 | |
1156 | return buf - tmp; | |
1157 | } | |
1158 | ||
0e60836b | 1159 | char *synthesize_probe_trace_command(struct probe_trace_event *tev) |
4235b045 | 1160 | { |
0e60836b | 1161 | struct probe_trace_point *tp = &tev->point; |
50656eec MH |
1162 | char *buf; |
1163 | int i, len, ret; | |
1164 | ||
e334016f MH |
1165 | buf = zalloc(MAX_CMDLEN); |
1166 | if (buf == NULL) | |
1167 | return NULL; | |
1168 | ||
4235b045 MH |
1169 | len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s+%lu", |
1170 | tp->retprobe ? 'r' : 'p', | |
1171 | tev->group, tev->event, | |
1172 | tp->symbol, tp->offset); | |
1173 | if (len <= 0) | |
50656eec | 1174 | goto error; |
50656eec | 1175 | |
4235b045 | 1176 | for (i = 0; i < tev->nargs; i++) { |
0e60836b | 1177 | ret = synthesize_probe_trace_arg(&tev->args[i], buf + len, |
4235b045 | 1178 | MAX_CMDLEN - len); |
4de189fe | 1179 | if (ret <= 0) |
50656eec MH |
1180 | goto error; |
1181 | len += ret; | |
1182 | } | |
50656eec | 1183 | |
4235b045 | 1184 | return buf; |
50656eec | 1185 | error: |
4235b045 MH |
1186 | free(buf); |
1187 | return NULL; | |
1188 | } | |
50656eec | 1189 | |
0e60836b | 1190 | static int convert_to_perf_probe_event(struct probe_trace_event *tev, |
469b9b88 | 1191 | struct perf_probe_event *pev) |
4235b045 | 1192 | { |
02b95dad | 1193 | char buf[64] = ""; |
146a1439 | 1194 | int i, ret; |
4235b045 | 1195 | |
4b4da7f7 | 1196 | /* Convert event/group name */ |
02b95dad MH |
1197 | pev->event = strdup(tev->event); |
1198 | pev->group = strdup(tev->group); | |
1199 | if (pev->event == NULL || pev->group == NULL) | |
1200 | return -ENOMEM; | |
fb1587d8 | 1201 | |
4b4da7f7 | 1202 | /* Convert trace_point to probe_point */ |
0e60836b | 1203 | ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point); |
146a1439 MH |
1204 | if (ret < 0) |
1205 | return ret; | |
4b4da7f7 | 1206 | |
4235b045 MH |
1207 | /* Convert trace_arg to probe_arg */ |
1208 | pev->nargs = tev->nargs; | |
e334016f MH |
1209 | pev->args = zalloc(sizeof(struct perf_probe_arg) * pev->nargs); |
1210 | if (pev->args == NULL) | |
1211 | return -ENOMEM; | |
02b95dad | 1212 | for (i = 0; i < tev->nargs && ret >= 0; i++) { |
4235b045 | 1213 | if (tev->args[i].name) |
02b95dad | 1214 | pev->args[i].name = strdup(tev->args[i].name); |
4235b045 | 1215 | else { |
0e60836b | 1216 | ret = synthesize_probe_trace_arg(&tev->args[i], |
146a1439 | 1217 | buf, 64); |
02b95dad | 1218 | pev->args[i].name = strdup(buf); |
4235b045 | 1219 | } |
02b95dad MH |
1220 | if (pev->args[i].name == NULL && ret >= 0) |
1221 | ret = -ENOMEM; | |
1222 | } | |
146a1439 MH |
1223 | |
1224 | if (ret < 0) | |
1225 | clear_perf_probe_event(pev); | |
1226 | ||
1227 | return ret; | |
4235b045 MH |
1228 | } |
1229 | ||
1230 | void clear_perf_probe_event(struct perf_probe_event *pev) | |
1231 | { | |
1232 | struct perf_probe_point *pp = &pev->point; | |
7df2f329 | 1233 | struct perf_probe_arg_field *field, *next; |
4235b045 MH |
1234 | int i; |
1235 | ||
1236 | if (pev->event) | |
1237 | free(pev->event); | |
1238 | if (pev->group) | |
1239 | free(pev->group); | |
1240 | if (pp->file) | |
1241 | free(pp->file); | |
1242 | if (pp->function) | |
1243 | free(pp->function); | |
1244 | if (pp->lazy_line) | |
1245 | free(pp->lazy_line); | |
7df2f329 | 1246 | for (i = 0; i < pev->nargs; i++) { |
4235b045 MH |
1247 | if (pev->args[i].name) |
1248 | free(pev->args[i].name); | |
48481938 MH |
1249 | if (pev->args[i].var) |
1250 | free(pev->args[i].var); | |
11a1ca35 MH |
1251 | if (pev->args[i].type) |
1252 | free(pev->args[i].type); | |
7df2f329 MH |
1253 | field = pev->args[i].field; |
1254 | while (field) { | |
1255 | next = field->next; | |
1256 | if (field->name) | |
1257 | free(field->name); | |
1258 | free(field); | |
1259 | field = next; | |
1260 | } | |
1261 | } | |
4235b045 MH |
1262 | if (pev->args) |
1263 | free(pev->args); | |
1264 | memset(pev, 0, sizeof(*pev)); | |
1265 | } | |
1266 | ||
0e60836b | 1267 | static void clear_probe_trace_event(struct probe_trace_event *tev) |
4235b045 | 1268 | { |
0e60836b | 1269 | struct probe_trace_arg_ref *ref, *next; |
4235b045 MH |
1270 | int i; |
1271 | ||
1272 | if (tev->event) | |
1273 | free(tev->event); | |
1274 | if (tev->group) | |
1275 | free(tev->group); | |
1276 | if (tev->point.symbol) | |
1277 | free(tev->point.symbol); | |
1278 | for (i = 0; i < tev->nargs; i++) { | |
1279 | if (tev->args[i].name) | |
1280 | free(tev->args[i].name); | |
1281 | if (tev->args[i].value) | |
1282 | free(tev->args[i].value); | |
4984912e MH |
1283 | if (tev->args[i].type) |
1284 | free(tev->args[i].type); | |
4235b045 MH |
1285 | ref = tev->args[i].ref; |
1286 | while (ref) { | |
1287 | next = ref->next; | |
1288 | free(ref); | |
1289 | ref = next; | |
1290 | } | |
1291 | } | |
1292 | if (tev->args) | |
1293 | free(tev->args); | |
1294 | memset(tev, 0, sizeof(*tev)); | |
50656eec MH |
1295 | } |
1296 | ||
f4d7da49 | 1297 | static int open_kprobe_events(bool readwrite) |
4de189fe MH |
1298 | { |
1299 | char buf[PATH_MAX]; | |
7ca5989d | 1300 | const char *__debugfs; |
4de189fe MH |
1301 | int ret; |
1302 | ||
7ca5989d MH |
1303 | __debugfs = debugfs_find_mountpoint(); |
1304 | if (__debugfs == NULL) { | |
1305 | pr_warning("Debugfs is not mounted.\n"); | |
1306 | return -ENOENT; | |
1307 | } | |
1308 | ||
1309 | ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs); | |
146a1439 | 1310 | if (ret >= 0) { |
7ca5989d | 1311 | pr_debug("Opening %s write=%d\n", buf, readwrite); |
146a1439 MH |
1312 | if (readwrite && !probe_event_dry_run) |
1313 | ret = open(buf, O_RDWR, O_APPEND); | |
1314 | else | |
1315 | ret = open(buf, O_RDONLY, 0); | |
1316 | } | |
f4d7da49 | 1317 | |
4de189fe MH |
1318 | if (ret < 0) { |
1319 | if (errno == ENOENT) | |
146a1439 MH |
1320 | pr_warning("kprobe_events file does not exist - please" |
1321 | " rebuild kernel with CONFIG_KPROBE_EVENT.\n"); | |
4de189fe | 1322 | else |
146a1439 MH |
1323 | pr_warning("Failed to open kprobe_events file: %s\n", |
1324 | strerror(errno)); | |
4de189fe MH |
1325 | } |
1326 | return ret; | |
1327 | } | |
1328 | ||
1329 | /* Get raw string list of current kprobe_events */ | |
0e60836b | 1330 | static struct strlist *get_probe_trace_command_rawlist(int fd) |
4de189fe MH |
1331 | { |
1332 | int ret, idx; | |
1333 | FILE *fp; | |
1334 | char buf[MAX_CMDLEN]; | |
1335 | char *p; | |
1336 | struct strlist *sl; | |
1337 | ||
1338 | sl = strlist__new(true, NULL); | |
1339 | ||
1340 | fp = fdopen(dup(fd), "r"); | |
1341 | while (!feof(fp)) { | |
1342 | p = fgets(buf, MAX_CMDLEN, fp); | |
1343 | if (!p) | |
1344 | break; | |
1345 | ||
1346 | idx = strlen(p) - 1; | |
1347 | if (p[idx] == '\n') | |
1348 | p[idx] = '\0'; | |
1349 | ret = strlist__add(sl, buf); | |
146a1439 MH |
1350 | if (ret < 0) { |
1351 | pr_debug("strlist__add failed: %s\n", strerror(-ret)); | |
1352 | strlist__delete(sl); | |
1353 | return NULL; | |
1354 | } | |
4de189fe MH |
1355 | } |
1356 | fclose(fp); | |
1357 | ||
1358 | return sl; | |
1359 | } | |
1360 | ||
278498d4 | 1361 | /* Show an event */ |
146a1439 | 1362 | static int show_perf_probe_event(struct perf_probe_event *pev) |
278498d4 | 1363 | { |
7e990a51 | 1364 | int i, ret; |
278498d4 | 1365 | char buf[128]; |
4235b045 | 1366 | char *place; |
278498d4 | 1367 | |
4235b045 MH |
1368 | /* Synthesize only event probe point */ |
1369 | place = synthesize_perf_probe_point(&pev->point); | |
146a1439 MH |
1370 | if (!place) |
1371 | return -EINVAL; | |
4235b045 MH |
1372 | |
1373 | ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event); | |
7e990a51 | 1374 | if (ret < 0) |
146a1439 MH |
1375 | return ret; |
1376 | ||
fb1587d8 | 1377 | printf(" %-20s (on %s", buf, place); |
278498d4 | 1378 | |
4235b045 | 1379 | if (pev->nargs > 0) { |
278498d4 | 1380 | printf(" with"); |
7df2f329 | 1381 | for (i = 0; i < pev->nargs; i++) { |
146a1439 MH |
1382 | ret = synthesize_perf_probe_arg(&pev->args[i], |
1383 | buf, 128); | |
1384 | if (ret < 0) | |
1385 | break; | |
7df2f329 MH |
1386 | printf(" %s", buf); |
1387 | } | |
278498d4 MH |
1388 | } |
1389 | printf(")\n"); | |
4235b045 | 1390 | free(place); |
146a1439 | 1391 | return ret; |
278498d4 MH |
1392 | } |
1393 | ||
4de189fe | 1394 | /* List up current perf-probe events */ |
146a1439 | 1395 | int show_perf_probe_events(void) |
4de189fe | 1396 | { |
146a1439 | 1397 | int fd, ret; |
0e60836b | 1398 | struct probe_trace_event tev; |
4235b045 | 1399 | struct perf_probe_event pev; |
4de189fe MH |
1400 | struct strlist *rawlist; |
1401 | struct str_node *ent; | |
1402 | ||
72041334 | 1403 | setup_pager(); |
146a1439 MH |
1404 | ret = init_vmlinux(); |
1405 | if (ret < 0) | |
1406 | return ret; | |
4235b045 MH |
1407 | |
1408 | memset(&tev, 0, sizeof(tev)); | |
1409 | memset(&pev, 0, sizeof(pev)); | |
72041334 | 1410 | |
f4d7da49 | 1411 | fd = open_kprobe_events(false); |
146a1439 MH |
1412 | if (fd < 0) |
1413 | return fd; | |
1414 | ||
0e60836b | 1415 | rawlist = get_probe_trace_command_rawlist(fd); |
4de189fe | 1416 | close(fd); |
146a1439 MH |
1417 | if (!rawlist) |
1418 | return -ENOENT; | |
4de189fe | 1419 | |
adf365f4 | 1420 | strlist__for_each(ent, rawlist) { |
0e60836b | 1421 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1422 | if (ret >= 0) { |
1423 | ret = convert_to_perf_probe_event(&tev, &pev); | |
1424 | if (ret >= 0) | |
1425 | ret = show_perf_probe_event(&pev); | |
1426 | } | |
4235b045 | 1427 | clear_perf_probe_event(&pev); |
0e60836b | 1428 | clear_probe_trace_event(&tev); |
146a1439 MH |
1429 | if (ret < 0) |
1430 | break; | |
4de189fe | 1431 | } |
4de189fe | 1432 | strlist__delete(rawlist); |
146a1439 MH |
1433 | |
1434 | return ret; | |
4de189fe MH |
1435 | } |
1436 | ||
b498ce1f | 1437 | /* Get current perf-probe event names */ |
0e60836b | 1438 | static struct strlist *get_probe_trace_event_names(int fd, bool include_group) |
b498ce1f | 1439 | { |
fa28244d | 1440 | char buf[128]; |
b498ce1f MH |
1441 | struct strlist *sl, *rawlist; |
1442 | struct str_node *ent; | |
0e60836b | 1443 | struct probe_trace_event tev; |
146a1439 | 1444 | int ret = 0; |
b498ce1f | 1445 | |
4235b045 | 1446 | memset(&tev, 0, sizeof(tev)); |
0e60836b | 1447 | rawlist = get_probe_trace_command_rawlist(fd); |
e1d2017b | 1448 | sl = strlist__new(true, NULL); |
adf365f4 | 1449 | strlist__for_each(ent, rawlist) { |
0e60836b | 1450 | ret = parse_probe_trace_command(ent->s, &tev); |
146a1439 MH |
1451 | if (ret < 0) |
1452 | break; | |
fa28244d | 1453 | if (include_group) { |
146a1439 MH |
1454 | ret = e_snprintf(buf, 128, "%s:%s", tev.group, |
1455 | tev.event); | |
1456 | if (ret >= 0) | |
1457 | ret = strlist__add(sl, buf); | |
fa28244d | 1458 | } else |
146a1439 | 1459 | ret = strlist__add(sl, tev.event); |
0e60836b | 1460 | clear_probe_trace_event(&tev); |
146a1439 MH |
1461 | if (ret < 0) |
1462 | break; | |
b498ce1f | 1463 | } |
b498ce1f MH |
1464 | strlist__delete(rawlist); |
1465 | ||
146a1439 MH |
1466 | if (ret < 0) { |
1467 | strlist__delete(sl); | |
1468 | return NULL; | |
1469 | } | |
b498ce1f MH |
1470 | return sl; |
1471 | } | |
1472 | ||
0e60836b | 1473 | static int write_probe_trace_event(int fd, struct probe_trace_event *tev) |
50656eec | 1474 | { |
6eca8cc3 | 1475 | int ret = 0; |
0e60836b | 1476 | char *buf = synthesize_probe_trace_command(tev); |
50656eec | 1477 | |
146a1439 | 1478 | if (!buf) { |
0e60836b | 1479 | pr_debug("Failed to synthesize probe trace event.\n"); |
146a1439 MH |
1480 | return -EINVAL; |
1481 | } | |
1482 | ||
fa28244d | 1483 | pr_debug("Writing event: %s\n", buf); |
f4d7da49 MH |
1484 | if (!probe_event_dry_run) { |
1485 | ret = write(fd, buf, strlen(buf)); | |
1486 | if (ret <= 0) | |
146a1439 MH |
1487 | pr_warning("Failed to write event: %s\n", |
1488 | strerror(errno)); | |
f4d7da49 | 1489 | } |
4235b045 | 1490 | free(buf); |
146a1439 | 1491 | return ret; |
50656eec MH |
1492 | } |
1493 | ||
146a1439 MH |
1494 | static int get_new_event_name(char *buf, size_t len, const char *base, |
1495 | struct strlist *namelist, bool allow_suffix) | |
b498ce1f MH |
1496 | { |
1497 | int i, ret; | |
17f88fcd MH |
1498 | |
1499 | /* Try no suffix */ | |
1500 | ret = e_snprintf(buf, len, "%s", base); | |
146a1439 MH |
1501 | if (ret < 0) { |
1502 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1503 | return ret; | |
1504 | } | |
17f88fcd | 1505 | if (!strlist__has_entry(namelist, buf)) |
146a1439 | 1506 | return 0; |
17f88fcd | 1507 | |
d761b08b MH |
1508 | if (!allow_suffix) { |
1509 | pr_warning("Error: event \"%s\" already exists. " | |
1510 | "(Use -f to force duplicates.)\n", base); | |
146a1439 | 1511 | return -EEXIST; |
d761b08b MH |
1512 | } |
1513 | ||
17f88fcd MH |
1514 | /* Try to add suffix */ |
1515 | for (i = 1; i < MAX_EVENT_INDEX; i++) { | |
b498ce1f | 1516 | ret = e_snprintf(buf, len, "%s_%d", base, i); |
146a1439 MH |
1517 | if (ret < 0) { |
1518 | pr_debug("snprintf() failed: %s\n", strerror(-ret)); | |
1519 | return ret; | |
1520 | } | |
b498ce1f MH |
1521 | if (!strlist__has_entry(namelist, buf)) |
1522 | break; | |
1523 | } | |
146a1439 MH |
1524 | if (i == MAX_EVENT_INDEX) { |
1525 | pr_warning("Too many events are on the same function.\n"); | |
1526 | ret = -ERANGE; | |
1527 | } | |
1528 | ||
1529 | return ret; | |
b498ce1f MH |
1530 | } |
1531 | ||
0e60836b SD |
1532 | static int __add_probe_trace_events(struct perf_probe_event *pev, |
1533 | struct probe_trace_event *tevs, | |
146a1439 | 1534 | int ntevs, bool allow_suffix) |
50656eec | 1535 | { |
146a1439 | 1536 | int i, fd, ret; |
0e60836b | 1537 | struct probe_trace_event *tev = NULL; |
4235b045 MH |
1538 | char buf[64]; |
1539 | const char *event, *group; | |
b498ce1f | 1540 | struct strlist *namelist; |
50656eec | 1541 | |
f4d7da49 | 1542 | fd = open_kprobe_events(true); |
146a1439 MH |
1543 | if (fd < 0) |
1544 | return fd; | |
b498ce1f | 1545 | /* Get current event names */ |
0e60836b | 1546 | namelist = get_probe_trace_event_names(fd, false); |
146a1439 MH |
1547 | if (!namelist) { |
1548 | pr_debug("Failed to get current event list.\n"); | |
1549 | return -EIO; | |
1550 | } | |
4235b045 | 1551 | |
146a1439 | 1552 | ret = 0; |
4235b045 | 1553 | printf("Add new event%s\n", (ntevs > 1) ? "s:" : ":"); |
02b95dad | 1554 | for (i = 0; i < ntevs; i++) { |
4235b045 MH |
1555 | tev = &tevs[i]; |
1556 | if (pev->event) | |
1557 | event = pev->event; | |
1558 | else | |
1559 | if (pev->point.function) | |
1560 | event = pev->point.function; | |
1561 | else | |
1562 | event = tev->point.symbol; | |
1563 | if (pev->group) | |
1564 | group = pev->group; | |
1565 | else | |
1566 | group = PERFPROBE_GROUP; | |
1567 | ||
1568 | /* Get an unused new event name */ | |
146a1439 MH |
1569 | ret = get_new_event_name(buf, 64, event, |
1570 | namelist, allow_suffix); | |
1571 | if (ret < 0) | |
1572 | break; | |
4235b045 MH |
1573 | event = buf; |
1574 | ||
02b95dad MH |
1575 | tev->event = strdup(event); |
1576 | tev->group = strdup(group); | |
1577 | if (tev->event == NULL || tev->group == NULL) { | |
1578 | ret = -ENOMEM; | |
1579 | break; | |
1580 | } | |
0e60836b | 1581 | ret = write_probe_trace_event(fd, tev); |
146a1439 MH |
1582 | if (ret < 0) |
1583 | break; | |
4235b045 MH |
1584 | /* Add added event name to namelist */ |
1585 | strlist__add(namelist, event); | |
1586 | ||
1587 | /* Trick here - save current event/group */ | |
1588 | event = pev->event; | |
1589 | group = pev->group; | |
1590 | pev->event = tev->event; | |
1591 | pev->group = tev->group; | |
1592 | show_perf_probe_event(pev); | |
1593 | /* Trick here - restore current event/group */ | |
1594 | pev->event = (char *)event; | |
1595 | pev->group = (char *)group; | |
1596 | ||
1597 | /* | |
1598 | * Probes after the first probe which comes from same | |
1599 | * user input are always allowed to add suffix, because | |
1600 | * there might be several addresses corresponding to | |
1601 | * one code line. | |
1602 | */ | |
1603 | allow_suffix = true; | |
50656eec | 1604 | } |
146a1439 MH |
1605 | |
1606 | if (ret >= 0) { | |
1607 | /* Show how to use the event. */ | |
1608 | printf("\nYou can now use it on all perf tools, such as:\n\n"); | |
1609 | printf("\tperf record -e %s:%s -aR sleep 1\n\n", tev->group, | |
1610 | tev->event); | |
1611 | } | |
a9b495b0 | 1612 | |
e1d2017b | 1613 | strlist__delete(namelist); |
50656eec | 1614 | close(fd); |
146a1439 | 1615 | return ret; |
50656eec | 1616 | } |
fa28244d | 1617 | |
0e60836b SD |
1618 | static int convert_to_probe_trace_events(struct perf_probe_event *pev, |
1619 | struct probe_trace_event **tevs, | |
469b9b88 | 1620 | int max_tevs, const char *module) |
e0faa8d3 MH |
1621 | { |
1622 | struct symbol *sym; | |
e334016f | 1623 | int ret = 0, i; |
0e60836b | 1624 | struct probe_trace_event *tev; |
4235b045 | 1625 | |
4b4da7f7 | 1626 | /* Convert perf_probe_event with debuginfo */ |
469b9b88 | 1627 | ret = try_to_find_probe_trace_events(pev, tevs, max_tevs, module); |
e334016f MH |
1628 | if (ret != 0) |
1629 | return ret; | |
e0faa8d3 | 1630 | |
4235b045 | 1631 | /* Allocate trace event buffer */ |
0e60836b | 1632 | tev = *tevs = zalloc(sizeof(struct probe_trace_event)); |
e334016f MH |
1633 | if (tev == NULL) |
1634 | return -ENOMEM; | |
4235b045 MH |
1635 | |
1636 | /* Copy parameters */ | |
02b95dad MH |
1637 | tev->point.symbol = strdup(pev->point.function); |
1638 | if (tev->point.symbol == NULL) { | |
1639 | ret = -ENOMEM; | |
1640 | goto error; | |
1641 | } | |
4235b045 | 1642 | tev->point.offset = pev->point.offset; |
04ddd04b | 1643 | tev->point.retprobe = pev->point.retprobe; |
4235b045 MH |
1644 | tev->nargs = pev->nargs; |
1645 | if (tev->nargs) { | |
0e60836b | 1646 | tev->args = zalloc(sizeof(struct probe_trace_arg) |
e334016f MH |
1647 | * tev->nargs); |
1648 | if (tev->args == NULL) { | |
02b95dad MH |
1649 | ret = -ENOMEM; |
1650 | goto error; | |
e334016f | 1651 | } |
48481938 | 1652 | for (i = 0; i < tev->nargs; i++) { |
02b95dad MH |
1653 | if (pev->args[i].name) { |
1654 | tev->args[i].name = strdup(pev->args[i].name); | |
1655 | if (tev->args[i].name == NULL) { | |
1656 | ret = -ENOMEM; | |
1657 | goto error; | |
1658 | } | |
1659 | } | |
1660 | tev->args[i].value = strdup(pev->args[i].var); | |
1661 | if (tev->args[i].value == NULL) { | |
1662 | ret = -ENOMEM; | |
1663 | goto error; | |
1664 | } | |
1665 | if (pev->args[i].type) { | |
1666 | tev->args[i].type = strdup(pev->args[i].type); | |
1667 | if (tev->args[i].type == NULL) { | |
1668 | ret = -ENOMEM; | |
1669 | goto error; | |
1670 | } | |
1671 | } | |
48481938 | 1672 | } |
4235b045 MH |
1673 | } |
1674 | ||
1675 | /* Currently just checking function name from symbol map */ | |
469b9b88 | 1676 | sym = __find_kernel_function_by_name(tev->point.symbol, NULL); |
146a1439 MH |
1677 | if (!sym) { |
1678 | pr_warning("Kernel symbol \'%s\' not found.\n", | |
1679 | tev->point.symbol); | |
02b95dad MH |
1680 | ret = -ENOENT; |
1681 | goto error; | |
1682 | } | |
e334016f | 1683 | |
02b95dad MH |
1684 | return 1; |
1685 | error: | |
0e60836b | 1686 | clear_probe_trace_event(tev); |
02b95dad MH |
1687 | free(tev); |
1688 | *tevs = NULL; | |
e334016f | 1689 | return ret; |
4235b045 MH |
1690 | } |
1691 | ||
1692 | struct __event_package { | |
1693 | struct perf_probe_event *pev; | |
0e60836b | 1694 | struct probe_trace_event *tevs; |
4235b045 MH |
1695 | int ntevs; |
1696 | }; | |
1697 | ||
146a1439 | 1698 | int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, |
469b9b88 | 1699 | int max_tevs, const char *module, bool force_add) |
4235b045 | 1700 | { |
146a1439 | 1701 | int i, j, ret; |
4235b045 MH |
1702 | struct __event_package *pkgs; |
1703 | ||
e334016f MH |
1704 | pkgs = zalloc(sizeof(struct __event_package) * npevs); |
1705 | if (pkgs == NULL) | |
1706 | return -ENOMEM; | |
4235b045 MH |
1707 | |
1708 | /* Init vmlinux path */ | |
146a1439 | 1709 | ret = init_vmlinux(); |
449e5b24 MH |
1710 | if (ret < 0) { |
1711 | free(pkgs); | |
146a1439 | 1712 | return ret; |
449e5b24 | 1713 | } |
4235b045 MH |
1714 | |
1715 | /* Loop 1: convert all events */ | |
1716 | for (i = 0; i < npevs; i++) { | |
1717 | pkgs[i].pev = &pevs[i]; | |
1718 | /* Convert with or without debuginfo */ | |
0e60836b | 1719 | ret = convert_to_probe_trace_events(pkgs[i].pev, |
469b9b88 MH |
1720 | &pkgs[i].tevs, |
1721 | max_tevs, | |
1722 | module); | |
146a1439 MH |
1723 | if (ret < 0) |
1724 | goto end; | |
1725 | pkgs[i].ntevs = ret; | |
e0faa8d3 MH |
1726 | } |
1727 | ||
4235b045 | 1728 | /* Loop 2: add all events */ |
146a1439 | 1729 | for (i = 0; i < npevs && ret >= 0; i++) |
0e60836b | 1730 | ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs, |
146a1439 MH |
1731 | pkgs[i].ntevs, force_add); |
1732 | end: | |
449e5b24 MH |
1733 | /* Loop 3: cleanup and free trace events */ |
1734 | for (i = 0; i < npevs; i++) { | |
146a1439 | 1735 | for (j = 0; j < pkgs[i].ntevs; j++) |
0e60836b | 1736 | clear_probe_trace_event(&pkgs[i].tevs[j]); |
449e5b24 MH |
1737 | free(pkgs[i].tevs); |
1738 | } | |
1739 | free(pkgs); | |
146a1439 MH |
1740 | |
1741 | return ret; | |
e0faa8d3 MH |
1742 | } |
1743 | ||
0e60836b | 1744 | static int __del_trace_probe_event(int fd, struct str_node *ent) |
bbbb521b MH |
1745 | { |
1746 | char *p; | |
1747 | char buf[128]; | |
4235b045 | 1748 | int ret; |
bbbb521b | 1749 | |
0e60836b | 1750 | /* Convert from perf-probe event to trace-probe event */ |
146a1439 MH |
1751 | ret = e_snprintf(buf, 128, "-:%s", ent->s); |
1752 | if (ret < 0) | |
1753 | goto error; | |
1754 | ||
bbbb521b | 1755 | p = strchr(buf + 2, ':'); |
146a1439 MH |
1756 | if (!p) { |
1757 | pr_debug("Internal error: %s should have ':' but not.\n", | |
1758 | ent->s); | |
1759 | ret = -ENOTSUP; | |
1760 | goto error; | |
1761 | } | |
bbbb521b MH |
1762 | *p = '/'; |
1763 | ||
4235b045 MH |
1764 | pr_debug("Writing event: %s\n", buf); |
1765 | ret = write(fd, buf, strlen(buf)); | |
146a1439 MH |
1766 | if (ret < 0) |
1767 | goto error; | |
1768 | ||
bbbb521b | 1769 | printf("Remove event: %s\n", ent->s); |
146a1439 MH |
1770 | return 0; |
1771 | error: | |
1772 | pr_warning("Failed to delete event: %s\n", strerror(-ret)); | |
1773 | return ret; | |
bbbb521b MH |
1774 | } |
1775 | ||
0e60836b | 1776 | static int del_trace_probe_event(int fd, const char *group, |
146a1439 | 1777 | const char *event, struct strlist *namelist) |
fa28244d MH |
1778 | { |
1779 | char buf[128]; | |
bbbb521b | 1780 | struct str_node *ent, *n; |
146a1439 | 1781 | int found = 0, ret = 0; |
fa28244d | 1782 | |
146a1439 MH |
1783 | ret = e_snprintf(buf, 128, "%s:%s", group, event); |
1784 | if (ret < 0) { | |
0e43e5d2 | 1785 | pr_err("Failed to copy event.\n"); |
146a1439 MH |
1786 | return ret; |
1787 | } | |
fa28244d | 1788 | |
bbbb521b MH |
1789 | if (strpbrk(buf, "*?")) { /* Glob-exp */ |
1790 | strlist__for_each_safe(ent, n, namelist) | |
1791 | if (strglobmatch(ent->s, buf)) { | |
1792 | found++; | |
0e60836b | 1793 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1794 | if (ret < 0) |
1795 | break; | |
bbbb521b MH |
1796 | strlist__remove(namelist, ent); |
1797 | } | |
1798 | } else { | |
1799 | ent = strlist__find(namelist, buf); | |
1800 | if (ent) { | |
1801 | found++; | |
0e60836b | 1802 | ret = __del_trace_probe_event(fd, ent); |
146a1439 MH |
1803 | if (ret >= 0) |
1804 | strlist__remove(namelist, ent); | |
bbbb521b MH |
1805 | } |
1806 | } | |
146a1439 MH |
1807 | if (found == 0 && ret >= 0) |
1808 | pr_info("Info: Event \"%s\" does not exist.\n", buf); | |
1809 | ||
1810 | return ret; | |
fa28244d MH |
1811 | } |
1812 | ||
146a1439 | 1813 | int del_perf_probe_events(struct strlist *dellist) |
fa28244d | 1814 | { |
146a1439 | 1815 | int fd, ret = 0; |
fa28244d MH |
1816 | const char *group, *event; |
1817 | char *p, *str; | |
1818 | struct str_node *ent; | |
1819 | struct strlist *namelist; | |
1820 | ||
f4d7da49 | 1821 | fd = open_kprobe_events(true); |
146a1439 MH |
1822 | if (fd < 0) |
1823 | return fd; | |
1824 | ||
fa28244d | 1825 | /* Get current event names */ |
0e60836b | 1826 | namelist = get_probe_trace_event_names(fd, true); |
146a1439 MH |
1827 | if (namelist == NULL) |
1828 | return -EINVAL; | |
fa28244d | 1829 | |
adf365f4 | 1830 | strlist__for_each(ent, dellist) { |
02b95dad MH |
1831 | str = strdup(ent->s); |
1832 | if (str == NULL) { | |
1833 | ret = -ENOMEM; | |
1834 | break; | |
1835 | } | |
bbbb521b | 1836 | pr_debug("Parsing: %s\n", str); |
fa28244d MH |
1837 | p = strchr(str, ':'); |
1838 | if (p) { | |
1839 | group = str; | |
1840 | *p = '\0'; | |
1841 | event = p + 1; | |
1842 | } else { | |
bbbb521b | 1843 | group = "*"; |
fa28244d MH |
1844 | event = str; |
1845 | } | |
bbbb521b | 1846 | pr_debug("Group: %s, Event: %s\n", group, event); |
0e60836b | 1847 | ret = del_trace_probe_event(fd, group, event, namelist); |
fa28244d | 1848 | free(str); |
146a1439 MH |
1849 | if (ret < 0) |
1850 | break; | |
fa28244d MH |
1851 | } |
1852 | strlist__delete(namelist); | |
1853 | close(fd); | |
146a1439 MH |
1854 | |
1855 | return ret; | |
fa28244d MH |
1856 | } |
1857 |